The Largest Insurance Brokers in 2026

BrokersBloc Article • Industry & Markets

Exploring the Largest Insurance Brokers in 2026: Key Players and Market Insights

Insurance is an OLD industry, and some firms have grown to staggering proportions. Use this list to discover the largest insurance brokers in 2026 by revenue, their global impact, and industry trends. Then, learn how BrokersBloc collaborates with top brokers to deliver tailored solutions for clients.

By BrokersBloc
• Last updated:
• Reading time: ~8 minutes

 

Key Takeaways

  • The largest insurance brokers in 2026, ranked by revenue, include Marsh & McLennan ($25.3B), Aon ($15.4B), and Arthur J. Gallagher ($11.1B), dominating through mergers, acquisitions, and technological innovation.[1]
  • These brokers provide extensive services such as risk management, employee benefits, and reinsurance, aiding businesses in managing complex insurance requirements amid rising claims and economic shifts.
  • Industry trends for 2026 highlight AI adoption, cyber risk focus, talent shortages, and broker consolidation, with premium growth expected to moderate globally.[2]
  • User and employee feedback emphasizes career growth opportunities but points to challenges like heavy workloads and post-merger integrations.[3]
  • As a general insurance agency, we collaborate with these leading brokers to offer clients access to premium services, ensuring customized and efficient coverage solutions.

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What Are the Largest Insurance Brokers in 2026?

In 2026, the insurance brokerage industry is characterized by a handful of giants that command significant market share through strategic growth and innovation. Rankings are primarily based on brokerage revenue, encompassing property/casualty, employee benefits, and reinsurance services. The top 20 brokers collectively generate over $80 billion in revenue, with the sector projected to experience moderated growth due to competitive pressures and economic uncertainties.[4]

Here are the top 10 global insurance brokers by 2024 revenues (latest available data, influencing 2026 standings):

  1. Marsh (Formerly Marsh & McLennan Cos. Inc.) ($25.3 billion, United States)
  2. Aon PLC ($15.4 billion, United Kingdom)
  3. Arthur J. Gallagher & Co. ($11.1 billion, United States)
  4. Willis Towers Watson PLC ($9.7 billion, United Kingdom)
  5. Alliant Insurance Services, Inc. ($5.0 billion, United States)
  6. Hub International Ltd. ($4.8 billion, United States)
  7. Brown & Brown Inc. ($4.7 billion, United States)
  8. Acrisure LLC ($4.0 billion, United States)
  9. Lockton Cos. LLC ($3.9 billion, United States)
  10. Howden Insurance Brokers Ltd. ($3.8 billion, United Kingdom)

These firms serve a wide range of clients, from Fortune 500 companies to small and medium-sized businesses (SMBs), leveraging global networks to provide localized expertise in a market facing challenges like climate risks and cyber threats.[1]

The story of “largest broker” isn’t just revenue — it’s distribution power: global placement + analytics + specialized talent, packaged as risk and benefits strategy.

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Key Features of Top Insurance Brokers

Leading brokers like Marsh and Aon offer advanced risk advisory services, covering emerging threats such as cyber attacks, climate change, and supply chain disruptions.[5]
They provide benefits administration platforms for employee health plans, reinsurance brokerage for risk distribution, and data analytics for predictive insights. Global operations ensure compliance with international regulations, while digital tools like AI-powered quoting systems and client portals enable real-time policy management.

Sustainability is a growing focus, with ESG-integrated services helping clients align insurance strategies with environmental goals. These features position top brokers as strategic partners beyond mere policy placement.

Benefits for Businesses and Clients

Partnering with major brokers yields cost efficiencies through negotiated premiums and comprehensive coverage options, often reducing overall expenses by 10-20% via economies of scale.[6]
Businesses gain robust risk mitigation, with expert advice minimizing losses from unforeseen events. Compliance support, including ACA and GDPR adherence, alleviates regulatory burdens.

For clients, benefits include scalable solutions that grow with the business, enhanced employee retention through superior benefits packages, and proactive claims advocacy. Overall, these brokers deliver long-term value by optimizing insurance portfolios and fostering resilience in volatile markets.

Recent Developments and Growth

The industry has seen intense M&A activity, with Marsh McLennan’s acquisitions driving a 12% revenue increase and Aon expanding in reinsurance.[7]
Trends for 2026 include AI adoption for personalized services, a focus on cyber risks, and addressing talent shortages through upskilling.[8]
Deloitte’s outlook predicts declining global premium growth due to competition, while reinsurance treaties may see double-digit rate decreases.[2]

PwC notes megadeals in the US, emphasizing life/annuity platforms amid economic uncertainty.[9]
Executives stress “people-first” AI to enhance efficiency without replacing human expertise, positioning the sector for stable combined ratios in property/casualty (96-97%) per Fitch.

User Experiences and Reviews

Employee reviews on Glassdoor rate Marsh at 3.8/5 for strong culture and benefits but criticize work-life balance due to high demands.[3]
Aon scores 3.7/5, praised for growth opportunities but noted for pressure in fast-paced environments.[10]
Client feedback on Reddit highlights efficient claims processing and expertise, though some mention bureaucratic hurdles in large firms.[11]

Pros include innovation and global reach, while cons involve post-M&A integration challenges. Potential clients should assess service levels based on business size.

How the Largest Brokers Compare to Smaller Ones

Top brokers excel in scale, offering vast carrier access and advanced analytics, unlike smaller firms’ personalized, agile service.[4]
They invest heavily in AI, outpacing independents in efficiency but potentially at higher costs. Controlling 70% of market revenue, they provide stability, though smaller brokers may offer niche expertise without the overhead.

So how does an independent shop actually compete with that?

The national firms win on scale and carrier access — not service. The Independent Broker’s Playbook is five plays for taking the business they can’t be bothered to fight for, plus a 10-minute audit of where you’re leaving deals on the table. Free, no sales call.

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How Our Agency Can Help with Top Insurance Brokers

As a general insurance agency, BrokersBloc partners with independent brokers to secure competitive quotes and customized plans.

Our services include needs assessments, enrollment assistance, and ongoing policy management.
Visit brokersbloc.com/about to learn more, or contact us at
brokersbloc.com/contact for a free consultation.

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FAQs About the Largest Insurance Brokers in 2026

Who are the top 3 by revenue? Marsh ($25.3B), Aon ($15.4B), and Arthur J. Gallagher ($11.1B).[1]

What drives their growth? M&A, technological advancements like AI, and adapting to market trends such as cyber risks.[8]

What are common drawbacks? Heavy workloads and integration issues post-acquisitions, as per reviews.[3]

How do acquisitions affect clients? They expand services but may involve transitional adjustments.[7]

How can I partner with them? Contact our agency for introductions and guided implementation.

Conclusion

The largest insurance brokers in 2026 continue to shape the industry through scale, innovation, and strategic adaptations to challenges like AI integration and climate risks.
Their comprehensive services empower businesses with efficient risk management and cost savings.
If you’re seeking to leverage these leaders, our agency is here to help—reach out at
brokersbloc.com/contact for personalized guidance and a path to superior insurance solutions.

Want the five plays independent brokers use to win against the national firms?

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BrokersBloc helps independent benefits brokers win more business with better carriers, better tools, and better workflows.

References

  1. Top Global Insurance Brokers – III
  2. 2026 Global Insurance Outlook – Deloitte
  3. Marsh Reviews on Glassdoor
  4. Top 100 Insurance Brokers Revenue – MarshBerry
  5. Top Global Insurance Brokers – Reinsurance News
  6. Top Insurance Brokerages by Revenue – Insurance Business
  7. Insurance Deals Outlook – PwC
  8. 7 Trends for Insurance Agents in 2026 – PropertyCasualty360
  9. State of the Market 2026 – Amwins
  10. Aon Reviews on Glassdoor
  11. Insurance Brokerage Reviews – Reddit